do you have anything unusual in /etc/profile, it seems to warn of a bashism in line 20. From gdm try chosing Xfce session explicitly not leave the default. It seems it starts xfce4-session directly not startxfce4. Not sure if it matter though.
-- After boot, my first login automatically logs out https://launchpad.net/bugs/94440 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
